I read that no differently than how they word their firmware updates stating how the most recent update includes the improvements provided in past updates. That could imply when they added the A99. They don't state that as being a reason for the latest update.

In other words, if you never updated to the previous versions and go straight to the latest then you will gain all the improvements incorporated in the previous versions. There is no need to update through each version to acquire said improvements.

This specific update mentions adding or improving on the following over version 3.0: